Brush ferrule



FIG. 1 is a bottom perspective view of an aspect of a brush ferrule.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right-side elevation view thereof.

FIG. 5 is a left-side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Those features shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a brush ferrule, as shown and described. 